dUpLicity～嘘の先にあるもの～

Yukina Kudou is a third-year high school student with a secret. Behind her daily sickly school girl act, she has important job to do. One day, she receives a warning that she's doing her job terribly, and if there is no improvement upon her graduation, she will be fired. She has only six months. What is this secret position she holds? What is its true goal? [From Official site]